Extend hcl2 support with more functions

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

vendor/github.com/hashicorp/go-cty-funcs/encoding/base64.go

@@ -0,0 +1,71 @@
+package encoding
+
+import (
+	"encoding/base64"
+	"fmt"
+	"log"
+	"unicode/utf8"
+
+	"github.com/zclconf/go-cty/cty"
+	"github.com/zclconf/go-cty/cty/function"
+)
+
+// Base64DecodeFunc is a function that decodes a string containing a base64 sequence.
+var Base64DecodeFunc = function.New(&function.Spec{
+	Params: []function.Parameter{
+		{
+			Name: "str",
+			Type: cty.String,
+		},
+	},
+	Type: function.StaticReturnType(cty.String),
+	Impl: func(args []cty.Value, retType cty.Type) (cty.Value, error) {
+		s := args[0].AsString()
+		sDec, err := base64.StdEncoding.DecodeString(s)
+		if err != nil {
+			return cty.UnknownVal(cty.String), fmt.Errorf("failed to decode base64 data '%s'", s)
+		}
+		if !utf8.Valid([]byte(sDec)) {
+			log.Printf("[DEBUG] the result of decoding the the provided string is not valid UTF-8: %s", sDec)
+			return cty.UnknownVal(cty.String), fmt.Errorf("the result of decoding the the provided string is not valid UTF-8")
+		}
+		return cty.StringVal(string(sDec)), nil
+	},
+})
+
+// Base64EncodeFunc is a function that encodes a string to a base64 sequence.
+var Base64EncodeFunc = function.New(&function.Spec{
+	Params: []function.Parameter{
+		{
+			Name: "str",
+			Type: cty.String,
+		},
+	},
+	Type: function.StaticReturnType(cty.String),
+	Impl: func(args []cty.Value, retType cty.Type) (cty.Value, error) {
+		return cty.StringVal(base64.StdEncoding.EncodeToString([]byte(args[0].AsString()))), nil
+	},
+})
+
+// Base64Decode decodes a string containing a base64 sequence.
+//
+// Terraform uses the "standard" Base64 alphabet as defined in RFC 4648 section 4.
+//
+// Strings in the Terraform language are sequences of unicode characters rather
+// than bytes, so this function will also interpret the resulting bytes as
+// UTF-8. If the bytes after Base64 decoding are _not_ valid UTF-8, this function
+// produces an error.
+func Base64Decode(str cty.Value) (cty.Value, error) {
+	return Base64DecodeFunc.Call([]cty.Value{str})
+}
+
+// Base64Encode applies Base64 encoding to a string.
+//
+// Terraform uses the "standard" Base64 alphabet as defined in RFC 4648 section 4.
+//
+// Strings in the Terraform language are sequences of unicode characters rather
+// than bytes, so this function will first encode the characters from the string
+// as UTF-8, and then apply Base64 encoding to the result.
+func Base64Encode(str cty.Value) (cty.Value, error) {
+	return Base64EncodeFunc.Call([]cty.Value{str})
+}

vendor/github.com/hashicorp/go-cty-funcs/encoding/url.go

@@ -0,0 +1,34 @@
+package encoding
+
+import (
+	"net/url"
+
+	"github.com/zclconf/go-cty/cty"
+	"github.com/zclconf/go-cty/cty/function"
+)
+
+// URLEncodeFunc is a function that applies URL encoding to a given string.
+var URLEncodeFunc = function.New(&function.Spec{
+	Params: []function.Parameter{
+		{
+			Name: "str",
+			Type: cty.String,
+		},
+	},
+	Type: function.StaticReturnType(cty.String),
+	Impl: func(args []cty.Value, retType cty.Type) (cty.Value, error) {
+		return cty.StringVal(url.QueryEscape(args[0].AsString())), nil
+	},
+})
+
+// URLEncode applies URL encoding to a given string.
+//
+// This function identifies characters in the given string that would have a
+// special meaning when included as a query string argument in a URL and
+// escapes them using RFC 3986 "percent encoding".
+//
+// If the given string contains non-ASCII characters, these are first encoded as
+// UTF-8 and then percent encoding is applied separately to each UTF-8 byte.
+func URLEncode(str cty.Value) (cty.Value, error) {
+	return URLEncodeFunc.Call([]cty.Value{str})
+}